Integrated: 7511: Add 2021-12 target platform

[Marcus Hirt]

On Sun, 16 Jan 2022 14:24:18 GMT, Marcus Hirt <hirt at openjdk.org> wrote:

> Not adding as default yet.

This pull request has now been integrated.

Changeset: 8152e8d8
Author:    Marcus Hirt <hirt at openjdk.org>
URL:       https://git.openjdk.java.net/jmc/commit/8152e8d804f653f949bfa54abf6ca70b21b86037
Stats:     49 lines in 5 files changed: 39 ins; 0 del; 10 mod

7511: Add 2021-12 target platform

Reviewed-by: jpbempel, aptmac

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PR: https://git.openjdk.java.net/jmc/pull/360